I got the Sims for Mac... I can confirm (like some people already did) that it runs fine on OS X. When you get the CD-ROM you will see this but I wanted to mention that you have to "install" twice for OS X. They have an OS X-only Carbon version. So you run the installation once to get the Sims on the machine, then again to install the Carbon version for OS X.
The package is $80, last I remember, and contains the Sims, Living Large and House Party expansion packs. You basically get one expansion pack for free.
Yeah, I know, you get the Sims and Living Large for less than $40 for PC now... but I think Mac is still worth it. I am not much of a gamer so I don't suffer much.